How to get spfielduser value in REST call ?

use below kind of query to get the SPFieldUserValue in REST based call

url: _spPageContextInfo.webAbsoluteUrl + "/_api/web/lists/getbytitle('" + listName + "')/Items?$select=Title,EmployeePhone,LeaveCategory,EmployeeLocation,EmployeeName/Title&$expand=EmployeeName&$filter="+ restQuery,